General Description

The MAX629 low-power DC-DC converter features an internal N-channel MOSFET switch and programmable current limiting. It is designed to supply positive or negative bias voltages up to ±28V from input voltages in the 0.8V to VOUT range, and can be configured for boost, flyback, and SEPIC topologies.

Features

♦ Internal, 500mA, 28V N-Channel Switch (No External FET Required)

♦ Generates Positive or Negative Output Voltages

♦ 80µA Supply Current

♦ 1µA Max Shutdown Current

♦ Up to 300kHz Switching Frequency

♦ Adjustable Current Limit Allows Use of Small, Inexpensive Inductors

♦ 8-Pin SO Package

Applications

    Positive or Negative LCD Bias Generators

    High-Efficiency DC-DC Boost Converters

    Varactor Tuning Diode Bias

    Palmtop Computers

    2-Cell and 3-Cell Battery-Powered Applications